In this 1stedition of the AsphaltNEWS for 2015, it gives us tremendous pleasure to feature some highlights about the recent study tour to Europe as undertaken by a group of very enthusiastic South Africans.

As is customary for our April edition, we pay tribute to our 2014 Award winners and the contribution they make to the dependability of the bituminous industry. Well done Hugh, Jaco and Sandra!

Along with the other articles, we trust that you will find this e-magazine an enjoyable and informative read.

The 3rd International Symposium on Asphalt Pavements & Environment will be held in Sun City, South Africa on August 16, 2015. Following the tradition of previous such events in Zurich and Fortaleza, this ISAP APE Symposium 2015 is linked to CAPSA2015, a locally established conference, aiming to enhance the international contributions to the events. ISAP TC APE also aims to dovetail with CAPSA 2015, bringing an international perspective of research and development, with creative, sustainable solutions for flexible pavements. This is the first time that this symposium will be hosted in Africa. The symposium announcement is here and the website for this symposium is www.isap2015.co.za.

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A workshop entitled “A Step Forward Toward A Better Understanding of the Blending Between Recycled and Virgin Asphalts,” will be held in Raleigh, North Carolina, USA on June 1, 2014. This half day workshop is being organized by the Working Group 01 on “ Hot Recycling of RAP” of the International Society of Asphalt Pavements (ISAP) Technical Committee (TC) – Asphalt Pavements & Environment (APE). This workshop is intended to facilitate exchange of information on compatibility and blending of virgin and recycled asphalt binders for better performing asphalt pavements. For more information about the workshop please visit http://www.ncsu.edu/mckimmon/cpe/opd/ISAP/workshops.html and http://www.ncsu.edu/mckimmon/cpe/opd/ISAP/pdf/blendingWorkshop.pdf. Below is also the workshop description.

Workshop Description:

Estimating how much the recycled and the virgin asphalt binders blend in an asphalt mixture is a complex problem that yet needs to be resolved. The resistance of an asphalt mixture with high amount of recycled binder to pavement distresses such as moisture damage, fatigue and low temperature cracking can be associated with the compatibility and the degree of blending between the virgin and the recycled asphalt binders. This workshop is to present current national and international studies on any of the following aspects:

The fundamental physical and chemical properties of virgin and recycled asphalt binders that would affect the degree of blending.

Procedures for characterizing the degree of blending between virgin and recycled asphalt binders.

Relationship between the degree of blending and the performance of an asphalt pavement.

The workshop will consist of a number of presentations from different organizations along with enough time for questions and discussions. Details about the presenters and their topics will be disseminated soon.

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In this 3rd and final edition for 2103 of the AsphaltNEWS, we are pleased to be able to once again feature valuable contributions from a wide spectrum of technical, engineering and research professionals.

Following an article in the April edition about the construction of a trial section consisting of EVA-modified HiMA, a report of the visual inspection and field assessments reported on in this issue, show promising results. Also on the technical front, an update of the on-going investigation into PG specification has been provided as well as background information to the revision of Sabita’s manual 19 Guidelines for the design, manufacture and construction of bitumen-rubber asphalt wearing courses which is in the process of being published in CD format. We trust that you will find these and the other articles featured both informative and interesting.

Inside, you will find some exciting developments on a number of fronts such as progress on the introduction of a performance grade specification and the implications for the industry; innovation to produce a HiMa-like mixusing 35/50 pen bitumen and much, much more.

We also acknowledge our Award winners for the roles they play in their respective fields of Innovative Technology as well as Safe Work Practices.The bituminous product industry truly appreciates the contributions of individuals like these.

As always, you will find us at info@sabita.co.za for your thoughts and comments about this issue of asphaltNEWS. Alternatively, please browse our web site at www.sabita.co.za for general information and details of our product range.

Your comments and constructive criticisms are as always highly valued.

Welcome to our 3rd and last issue of asphaltNEWS for 2012 made possible by many of the articles being penned by our colleagues in the industry.

Some of the highlights in this final issue include inter alia: A report back on the inspection of the HiMA trial after 12 months and the 3 warm mix asphalt trials that were assessed in July having been laid between 2008-2009; Recycled Asphalt Survey Results; Feedback on HSE Seminars and Sabita’s Certification Scheme; A list of SANS Test Methods published by SABS, and other articles and information for your interest.

As always, you will find us at info@sabita.co.za for your thoughts and comments. Alternatively, please browse our web site at www.sabita.co.za for general information and details of our product range.

Thank you for your valued support and feedback throughout the year. We look forward to a new year that is filled with exciting challenges.

Wishing you and your loved ones a safe and joyous holiday season.

Kind regards

Saied Solomons

SABITA CEO

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